Lysimachia Primulaceae 747 



Blades of median leaves ovate to ovate-lanceolate, 2-6 cm wide, rounded or sub- 

 cordate at the base, the margins rigidly short-ciliate ; petioles of median leaves 

 mostly about 2 cm long, rarely as short as 1 cm, the margins thickly and 



strongly long-ciliate their entire length 5. L. ciliata. 



Blades of median leaves lanceolate, sometimes broadly so, 0.5-3 cm wide, long or 

 short taper-pointed at the base, the margins scabrous, rarely somewhat short- 

 ciliate; petioles (if any) of the median leaves generally less than 2 cm long, 

 the margins not so closely or strongly ciliate as those of the preceding species, 

 often only the basal part ciliate; calyx lobes 5-9 mm long. 

 Median and two lateral veins of calyx lobes very obscure when seen from the 

 outside under an 8-diameter magnification; plants stoloniferous, from a 

 long decumbent rootstock, 15-65 cm high, generally 20-30 cm high, usually 

 of dry woods and prairies, rarely in wet or moist situations, simple or with 

 short branches usually above the fifth to the seventh node, the branches 

 generally shorter than the subtending leaf, rarely the main stem dividing 

 into several branches below the fifth node; blades below the second and up 

 to the sixth internodes generally much shorter and of different shape from 

 those above, varying from nearly orbicular to broad-oblong, elliptic or 

 lanceolate, all petiolate; blades above the fifth internode (rarely down to 

 the second or up to the seventh) usually much longer than the lower blades, 

 up to 15 cm long, lanceolate to narrow-elliptic, long taper-pointed at the 



base, sessile, subsessile or rarely petiolate 6. L. lanceolata. 



Median and two lateral veins of calyx lobes plainly visible and usually distinct 

 when seen from the outside under an 8-diameter magnification ; plants 40-120 

 cm high, with long branches throughout; usually the largest and longest 

 leaves at the base of the plant (not so if they are stipular leaves), all 

 petiolate or sometimes a few at the top subsessile; lower and upper blades of 

 the same shape, mostly short taper-pointed at the base or sometimes the 



upper ones with a long taper-pointed base 7. L. hybrida. 



Blades of median leaves linear, mostly 2-7 mm wide, 1-nerved or very obscurely 

 pinnately veined, more or less involute, the margins smooth, sessile or some- 

 times the lower ones petiolate; branches usually longer than their subtending 

 leaves; calyx lobes plainly 1-nerved, 4-6.5 mm long 8. L. longifolia. 



1. Lysimachia Nummularia L. Moneywort. Map 1594. Frequent in 

 low ground along streams, ditches, roadsides, and elsewhere. I have seen 

 it form a carpet in low, open woods along streams, crowding out all other 

 herbaceous vegetation. When it becomes established in a pasture field, it 

 chokes out the native grass and is very difficult to exterminate. Since the 

 plant is not palatable to stock, my advice to land owners is to exterminate 

 it at any cost. 



Nat. of Eu. ; Newf. to Wis., southw. to N. J., Va., and 111. 



2. Lysimachia thyrsiflora L. (Naumbergia thyrsiflora (L.) Duby.) 

 Water Loosestrife. Map 1595. In mucky or peaty soil in bogs and 

 marshy places and less frequent in low, sandy borders of lakes. Usually 

 found in shallow water. 



This species has been placed in another genus by some authors, assuming 

 the presence of staminodia, but this character is not constant. (Rhodora 

 22: 193. 1920.) 



No doubt Andrews' report of this species from Monroe County should 

 be referred to some species which occurs in that county, and which he has 



